Q9:
For all integers n, the function f is defined by f (n) = an, where a is a constant. What is the value of f (1)?
(1) f (2) = 100
(2) f (3) = -1,000
A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
答案是B。可是我觉的statement (1)可以解出f(1)=10 或－10。为什么不是suggicient的呢。请大家帮忙解释一下， 非常感谢！ | 
